Malicious Office (OLE) / .DOCX — malware analysis report

Static analysis result for SHA-256 643eeead31f1c79f…

MALICIOUS

Office (OLE) / .DOCX

156.0 KB Created: 2020-12-30 18:32:00 Authoring application: Microsoft Office Word
MD5: e7ae536485fb08d3c9a17b44827d61dc SHA-1: e3b53c641bca3f33c6a52005ce4f927232813304 SHA-256: 643eeead31f1c79f2a2d191699189bd671ca0169fff0feeb3824ff0b57281e3b
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample contains VBA macros that execute upon opening the document, as indicated by the Document_Open heuristic. These macros utilize CreateObject to interact with the file system, attempting to create files in various temporary locations. The ClamAV detection 'Doc.Downloader.EmotetRed02224-9938637-0' strongly suggests a downloader functionality, likely to fetch and execute a secondary payload. The obfuscated nature of the VBA code and the file system operations point towards a malicious downloader.

Heuristics 6

  • ClamAV: Doc.Downloader.EmotetRed02224-9938637-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02224-9938637-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
e8d3f7d8d02f0b30fe9a4f739a77064bdfd79f1fb249409f6cc7dd9e6c88bf62		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6622 bytes

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